Iron pillar of Delhi was erected in the honor of the Hindu god, Vishnu and in the memory of the Gupta King Chandragupta ll. The pillar is made of 98 percent wrought iron and has stood more than 1600 years without rusting or decomposing. It is 7 meters high and 17 inches in diameter at the base and 12 at the top.
Iron pillar of Delhi | Atlas Obscura"a testament to the skill of ancient Indian blacksmiths" because of its high resistance to corrosion. The corrosion resistance results from an even layer of crystalline iron hydrogen phosphate forming on the high phosphorus content iron, which serves to protect it from the effects of the local Delhi climate.[
The Iron Pillar of Delhi is a nearly 24-ft. iron pillar that is located in the Quwwat-ul Mosque. It weighs more than 6 tons and is made of 98% wrought iron. It is thought that the Iron Pillar of Delhi was crafted using forge welding. The pillar is ornate, but hardly awe-inspiring, unless one knows just how long and mysterious the history of it is.
Most Mysterious Places on Earth...4. Iron pillar of Delhi, India. An ancient iron pillar in Delhi which seems to be rust proof.The Iron Pillar located in Delhi, India, is a 7 m (23 ft) column in the Qutub complex, notable for the rust-resistant composition of the metals used in its construction.